EN 6031:2015

SLOVENSKI STANDARD
01-januar-2016
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Aerospace series - Fibre reinforced plastics - Test method - Determination of in-plane
shear properties (± 45° tensile test)
Luft- und Raumfahrt - Faserverstirkte Kunststoffe - Prüfverfahren - Bestimmung der
Schubeigenschaften (± 45° Zugversuch)
Série aérospatiale - Matières plastiques renforcées de fibres - Méthode d'essai -
Détermination des propriétés en cisaillement plan (traction il ± 45°)
Ta slovenski standard je istoveten z: EN 6031:2015
ICS:
49.025.40 Guma in polimerni materiali Rubber and plastics
83.120 2MDþDQLSROLPHUL Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 6031
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2015
EUROPÄISCHE NORM
ICS 49.025.40
English Version
Aerospace series - Fibre reinforced plastics - Test method -
Determination of in-plane shear properties (± 45° tensile
test)
Série aérospatiale - Matières plastiques renforcées de Luft- und Raumfahrt - Faserverstärkte Kunststoffe -
fibres - Méthode d'essai - Détermination des propriétés Prüfverfahren - Bestimmung der Schubeigenschaften
en cisaillement plan (traction il ± 45°) (± 45° Zugversuch)
This European Standard was approved by CEN on 21 June 2014.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6031:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle of the method . 5
5 Designation of the method . 5
6 Apparatus . 5
7 Test specimen . 6
8 Procedure. 7
9 Presentation of the results . 8
10 Test report . 8
European foreword
This document (EN 6031:2015) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be
withdrawn at the latest by May 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This European Standard specifies the procedure for the determination of the in-plane shear strength
and modulus of fibre composites. The procedure is based on the uni-axial tensile stress-strain response
of a ± 45° laminate which is symmetrically laminated about the mid-plane.
This standard is applicable to composite laminates manufactured from unidirectional tape or woven
fabric reinforcement.
This standard does not give any directions necessary to meet the health and safety requirements. It is
the responsibility of the user of this standard to consult and establish appropriate health and safety
precautions.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 2374, Aerospace series — Glass fibre reinforced mouldings and sandwich composites — Production of
test panels
EN 2489, Aerospace series — Fibre reinforced plastics — Determination of the action of test fluids
1)
EN 2565, Aerospace series — Preparation of carbon fibre reinforced resin panels for test purposes
EN 2743, Aerospace series — Fibre reinforced plastics — Standard procedures for conditioning prior to
testing unaged materials
EN 2823, Aerospace series — Fibre reinforced plastics — Test method for the determination of the effect of
1)
exposure to humid atmosphere on physical and mechanical characteristics
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
tensile stress at a given moment during the test
longitudinal tensile load experienced by the test specimen at a particular moment during the test,
divided by the initial unit cross sectional area within the gauge length
3.2
shear stress at a given moment during the test
the shear stress is defined as the in-plane shear stress with its principal direction under ± 45° with the
direction in which the tension load is applied, and its magnitude is half of the tensile stress
3.3
shear strength
the shear strength is the maximum occurring shear stress during the test. For calculation see 9.1.

1) Published as ASD-STAN Prestandard at the date of publication of this standard. http://www.asd-stan.org/
3.4
tensile strain
variation in the longitudinal or transverse distance between points within the test specimen gauge
length, produced by a tensile load and expressed with respect to the initial distance between the points
(ε is the longitudinal strain, its value is positive; ε is the transverse strain of a tensile specimen, its
0 90
value is negative)
3.5
shear modulus
slope of the straight line in a shear stress/strain diagram through the points corresponding with two
-6
longitudinal strain limits. Unless otherwise defined these longitudinal strains are (ε ) = 500 × 10 and
0 1
-6
(ε ) = 2 500 × 10 (see Figure 3). For calculation see 9.2.
0 2
4 Principle of the method
Through the use of relations derived from laminated plate
...